Display screen or portion thereof with graphical user interface



The FIGURE is a front view of a display screen or portion thereof with a graphical user interface, showing a new design.

The broken lines show a display screen or portion thereof and form no part of the claimed design. The broken lines show portions of the graphical user interface and form no part of the claimed design. 

CLAIM An ornamental design for a display screen or a portion thereof with a graphical user interface, as shown and described. 